Paper made with cellulose fibers having an inner core of cellulose acetate
US5573640A · kind A · utility
39Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1995 |
| Grant date | Nov 12, 1996 |
| Priority date | — |
| Expiry date | Jul 28, 2015 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H13/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A composition of paper comprising 99 to 10 weight percent cellulose fibers and 1 to 90 weight percent cored cellulose fibers that are uniformly dispersed within the paper. The cored cellulose fibers are composed of a cellulose sheath that is 4 to 15 weight percent of the weight of the fiber and a cellulose acetate core. The cored cellulose fibers contain no substantial crimp and have an average length of 1 to 7 mm, a density of 1.20 to about 1.35 gm/cc, a denier 1 to 30 grams per 9,000 meters and a uniform dispersion index of less than 0.15.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.